Friday
May 24, 2013

# Posts by darren

Total # Posts: 90

Physics
You are holding a 5 kg dumbbell straight out at arm's length. Assuming your arm is 0.63 m long, what torque is the dumbbell exerting on your shoulder?

math
I'm having trouble solving this problem: definite integral (2-t)(sqrt(t)), 0..2

Math
What property changed(4c + 3c) + 6 to (4+3)c + 6?

pre- algebra
It's -5m not 5m

pre- algebra
Solve for m. -6m - 7 = -5m + 3

Physics
Suppose you wish to visit a star which is 450 light years away, and that you want your 21000 kg rocket to move so fast that you only age 20 years during the round trip. a. How fast must the rocket travel relative to the Earth? Give your answer as the fraction of the speed of l...

Physics
a)What speed must one frame of reference be moving relative to another for the two to disagree about the length by 1% b)What speed must one frame of reference be moving relative to another for the two frames to disagree about time intervals by 1%? Both answer should be fractio...

Physics
At what speed must one frame of reference be moving relative to another for the two frames to disagree about lengths by 1%? Express your result as a fraction of the speed of light. At what speed must one frame of reference be moving relative to another for the two frames to di...

Physics
A rocket cruising past Earth at 0.79c shoots two bullets at 0.92c relative to the rocket with one of the bullets fired along the direction of the rocket's motion and the other fired opposite the rocket's motion. (a) What velocity does an Earth-based experimenter measur...

Math
An airplane takes off in a straight path. When it has traveled 5 km, it is 3 km high. To the nearest kilometer, what is the horizontal distance, d that the airplane has flown over?

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